EUCOPEPODA FROM TANGANYIKA. 825 
The arms are dilated distally and bear, at about one-third their 
length from the end, a stout postero-dorsal process which 1s 
bluntly pointed. The body is bent dorsally through a consider- 
able angle at a little less than one-half its length from the head. 
It is not uniform in diameter, but shows a marked constriction at 
about the middle and an otherwise irregular contour which may 
indicate disappearing segmentation. Pre-genital prominence not 
very conspicuous, simple or slightly bilobed ; terminal portion of 
body not upturned and rotated very little, if at all. ‘The egg-sacs 
are long and tapering, about two-fifths length of body. They 
contain from four to five rows of eggs at their widest part. The 
eggs are slightly oval, "14:12 mm. 
Total length of complete specimen (excluding egg-sacs), 
8:4 mm.* 
Length of longer egg-sac, 3°5 mm. 
Remarks.—The two specimens on which this new species 1s 
founded are, unhappily, neither of them quite perfect. One of 
them, in fact, only consists of the main part of the body, without 
head, cephalic arms, or egg-sacs. This very Incomplete individual 
affords, however, valuable evidence in certain respects, for the 
sharp bend in the body and the noticeable constriction referred 
to above, are equally recognisable here, so that we may assume 
them to be definite features of the species. The specimen on 
which the description mainly rests has lost a portion of one 
cephalic arm, but we may fairly suppose it to have been the same 
as the one which is whole. In text-fig. 1, the missing part has 
been restored for the sake of affording a comparison with the 
other species. It is open to question how far the lobed nature of 
the body, which is so conspicuous, 1s indicative of segmentation. 
The fact that the most typical members of the genus show the 
body dilated into an almost formless sac, might suggest that we 
are dealing in the present case with a less modified condition. On 
the other hand, the position of the four pairs of swimming-feet, 
which appear to have no definite relation to the body lobes, is an 
argument against such a belief. 
The reference in the foregoing description to the terminal 
portion of the body, sufficiently indicates that in this form there 
is also complete or almost complete absence of the characteristic 
torsion of the body. This fact is, of course, equally displayed by 
the position of the swimming-feet, which are visible in a ventral 
view approximately in the middleline. All this implies, further, 
that the hinder end of the body cannot exhibit the usual boot-like 
shape as a consequence of deflection and rotation, as is generally 
the case, and yet it must be granted that the appearance in this 
respect is fairly typical. There is, of course, an important 
difference, namely that the shape in question is visible only in a 
lateral view, whereas it is shown in a ventral view of the more 
normal types as a result of the body torsion. In the present 
* This is the actual measurement of the specimen without taking into consideration 
its bent state. It would measure more if straightened out. 
